Defending against speculative attacks – It is risky,but it can pay off

While currency crises are typically considered to be painful and costly events, a closer look reveals that economic developments after a speculative attack differ considerably. Monetary authorities can play a central role in determining the economic course and costs of currency crises. They have to decide whether to defend or not to defend the domestic currency giving rise to three different types of crises: (i) an immediate depreciation if the central bank does not intervene and either (ii) a successful defense or (iii) an unsuccessful defense in the case of an intervention. We find that a central bank has two options to mitigate the costs of speculative attacks, namely an immediate depreciation and a successful defense. If a central bank intervenes she might be able to stabilize the exchange rate only temporarily and risks to ultimately fail facing the worst of the three scenarios with the highest economic costs.     

To intervene,or not to intervene: Monetary policy and the costs of currency crises

In case of speculative attacks, the central banks' decisions to intervene or not to intervene seem to play an important role for the economic costs of currency crises. The central bank can either abstain from intervening or start an intervention, which in turn can be successful or unsuccessful. Therefore, an adequate analysis of the costs of currency crises has to take into account three different types of currency crises: (i) an immediate depreciation without any central bank interventions, (ii) a successful defense, and (iii) an unsuccessful attempt to defend the exchange rate. We find that the decision of the central bank to intervene or to remain passive is risky. If the central bank intervenes and succeeds she can achieve the best growth performance on average. However, if the interventions are not maintained and the currency depreciates the subsequent output loss is particularly severe. Abstaining from an intervention yields a scenario with a relatively small drop in output. Giving in to a speculative attack rather than trying to fight it can thus be a suitable option for a risk-averse central bank.     

Budget deficit,external official borrowing,and sterilized invertion policy in foreign exchange markets

I study the effect of a temporary budget deficit, which is financed in the international capital market, on the exchange rate. First, I show that the exchange rate depreciates both in the short and in the long run if the government finances the deficit by selling debt denominated in foreign currencies to nonresidents. Secondaly, I show that the government can prevent an immediate depreciation of the exchange rate adopting a policy of sterilized intervation; however, the achievement of this short-run exchange rate target implies a long-run depreciation of the real exchange rate.     

高利率能否捍卫汇率稳定：基于马尔科夫变换的世代交叠模型的分析

按照传统观点,在本国货币遭受投机攻击时,中央银行的典型做法是提高短期利率来捍卫货币和汇率制度。但批评者认为,提高利率会增加经济发展的成本,容易引发信用恐慌和产出减少。通过建立一个基于马尔科夫变换的世代交叠模型可以发现,利率被提的越高,汇率波动率也会随之相应增加。当高利率的货币政策使经济增长放缓甚至衰退,维持汇率稳定的可信度下降时,投机者就会发动对本币的投机攻击。最后在外汇储备耗尽的情况下,中央银行权衡得失后不得不实行浮动汇率制。     

Exchange Rate Fluctuations and Output in Oil-Producing Countries: The Case of Iran

Conventional wisdom states that currency depreciation in oil-producing countries is contractionary because demand effects, limited by the prevalence of oil exports priced in dollars, are more than offset by adverse supply effects. Iran, however, has experienced a rapid increase in nonoil exports in the past decade. Against this background, the paper tests whether the conventional wisdom still applies to Iran and concludes that the emergence of the nonoil export sector has made currency depreciation expansionary. The expansionary effect is particularly evident regarding anticipated persistent depreciation in the long run. Notwithstanding the varying effects of exchange rate fluctuations on the demand and supply sides of the economy, managing a flexible exchange rate gradually over time toward achieving stability in the real effective exchange rate may strike the necessary balance.     

Do tax incentives affect investment quality?

This paper examines the effect of tax incentives in the form of bonus depreciation on investment quality. Using the expiration of tax incentives via bonus depreciation in eastern Germany and a representative panel of West German establishments, we show that bonus depreciation significantly lowers investment quality. The average quality of investments, measured by the responsiveness of future revenue and other proxies for cash flow to current investment, reduces by 15.2–23.8% in the short run and 31.8–41.4% in the long run. Our research suggests that this adverse effect of tax subsidies is greater for jurisdictions with higher tax rates, in times of high unemployment, and for large or low-productivity establishments. Overall, while increasing investment quantity, as shown by prior literature, tax incentives such as bonus depreciation substantially reduce the quality of investments.     

Empirics of currency crises: A duration analysis approach

This paper empirically analyzes the origins of currency crises for a group of OECD economies from 1970 through 1998. We apply duration analysis to examine how the probability of a currency crisis depends on the length of non‐crisis periods, contagion channels, and macroeconomic fundamentals. Our findings confirm the negative duration dependence of a currency crisis—the likelihood of speculative attack sharply increases at the beginning of non‐crisis periods and then declines over time until it abruptly rises again. The results also indicate the hazard of a crisis increase with high values of the volatility of unemployment rates, inflation rates, contagion factors—which mostly work through trade channels, unemployment rates, real effective exchange rate, trade openness, and size of economy. To address concerns regarding validity of the identified crisis episodes, we exploit crisis episodes that are identified by a more objective approach based on the extreme value theory. Our results are robust under various specifications including two different crisis event sets that are identified on monthly and quarterly basis.     

Fiscal Consolidations and Economic Growth

The aim of this paper is to deepen the understanding of the macroeconomic consequences of fiscal consolidations. In particular, there is evidence in the literature of fiscal consolidation episodes producing (non‐Keynesian) expansionary effects in the short run. We replicate this result for a panel of OECD countries under exogeneity of the fiscal consolidation. However, we provide some evidence that output growth might affect the fiscal tightening process so that fiscal consolidations are not exogenous to economic growth. Once we allow for feedback effects from economic growth to fiscal adjustments, we find that expansionary effects disappear and recover the typical Keynesian effect of fiscal adjustments. This finding points to the need to take these short‐term negative implications into account in the design of fiscal consolidations.     

Test of the J-curve for the DR-CAFTA countries and policy implications

There is evidence of a J-curve for the Dominican Republic and lack of support for a J-curve for Costa Rica, El Salvador, Guatemala, and Honduras. The trade balance responds to real depreciation positively for Costa Rica and El Salvador, negatively in the short run and positively in the long run for the Dominican Republic, negatively for Guatemala, and positively in the short run and negatively in the long run for Honduras. In response to real depreciation, the trade balance between the Dominican Republic and the U.S. adjusts from a negative to positive value very slowly.     

Explaining Forward Exchange Bias…Intraday

Intraday interest rates are zero. Consequently, a foreign exchange dealer can short a vulnerable currency in the morning, close this position in the afternoon, and never face an interest cost. This tactic might seem especially attractive in times of fixed-rate crisis, since it suggests an immunity to the central bank's interest rate defense. In equilibrium, however, buyers of the vulnerable currency must be compensated on average with an intraday capital gain as long as no devaluation occurs. That is, currencies under attack should typically appreciate intraday. Using data on intraday exchange rate changes within the European Monetary System, we find this prediction is borne out.     

Comovement of Exchange Rates: A Wavelet Analysis

In this article we investigate the behavior of exchange rates in Central and Eastern European countries. The results strongly indicate that interactions between exchange rates have different characteristics at different timescales. Our results show that CEE exchange rates are nearly perfectly integrated in the short and medium run, since the returns obtained in any of the CEE foreign exchange market can almost be explained by the overall performance in the other CEE markets. The discrepancies between CEE exchange rates are small, but increase within three to six months and that means in the long run the integration of foreign exchange markets is weak.     

Notes on the Underground: Monetary Policy in Resource‐Rich Economies

The central bank of a commodity‐exporting small open economy faces the traditional trade‐off between domestic inflation and output gap. The commodity sector introduces a terms‐of‐trade inefficiency that gives rise to an endogenous cost‐push shock, changes the target level for output, reduces the slope of the Phillips curve, and increases the importance of stabilizing the output gap. Optimal monetary policy calls for a reduction of the interest rate following a drop in the oil price. In contrast, a central bank with a mandate to stabilize consumer price inflation raises interest rates to limit the inflationary impact of an exchange rate depreciation.     

Regional Effects of Exchange Rate Fluctuations

We exploit differences across U.S. states' exposure to trade to study the effects of changes in the exchange rate on economic activity. Across states, trade-weighted exchange rate depreciations are associated with increased state exports, reduced state unemployment, and higher state hours worked. The effects are particularly strong during periods of economic slack. A multiregion model with interstate trade and labor flows, calibrated to match state-level trade data and migration flows, replicates the empirical relationship between exchange rates and unemployment. The high degree of interstate trade plays an important role in transmitting shocks across states in the first year, whereas interstate migration shapes cross-sectional patterns in later years. We use the model to study the regional effects of tariffs in the United States. The model suggests that a 25% Chinese import tariff on U.S. goods would be felt throughout the United States, even in states with small direct linkages to China, raising unemployment rates by 0.2 to 0.7 percentage points in the short run.     

The Determinants of Stock Prices: New Evidence from the Indian Banking Sector

We examine the determinants of stock prices for major Indian banks using panel data modeling techniques. Our work is novel because, for the first time in the literature on Indian banking, we use a panel Granger causality test that reveals the direction and sign of causality. We find evidence of panel cointegration among stock prices, economic activity, interest rates, and exchange rates for thirteen banks. Our results suggest that while economic activity and currency depreciation contribute to a rise in share prices, an increase in the interest rate reduces bank share prices. Moreover, only economic activity Granger-causes stock prices in the long run.     

The anticipated real interest rate,capital utilization and the cyclical pattern of real wages

This paper develops a channel through which increases in anticipated real interest rates can be ‘expansionary’ for current aggregate labor demand and current output supply. The key feature of the model is the introduction of a user cost of capital utilization which confronts the firm with the intertemporal problem of the optimal choices of capital utilization and depreciation. The resulting variation in capital utilization and capital services in response to fluctuations in the real rate of interest shifts the marginal product of labor and, thus, the demand for labor at the same time and in the same direction that Lucas-Rapping real interest rate effects operate on labor supply. The complete model places no a priori restrictions on the cyclical pattern of real wages, thus avoiding the countercyclical real wage prediction made by Keynes and various classical writers that is rejected by the data. Estimates of a labor demand schedule for the annual U.S. data reveal a significantly positive real interest rate effect.     

投机性货币冲击引发货币危机的条件及防范

由投机性货币冲击所引发的固定汇率制崩溃给实行固定汇率制的国家(或地区)的经济发展蒙上了一层沉重的阴影。为此，本文运用国内外关于货币危机中货币投机性冲击理论的最新研究成果分析了欧洲货币危机和东南亚金融危机中投机冲击致胜的基本条件，进而提出了我国加入WTO后防范和化解人民币危机的相关措施。     

人民币汇率变动与实际产出——基于协整的VECM分析

本文通过协整分析和VECM检验表明,实际产出、出口额、实际利用FDI和人民币实际有效汇率四个指标变量之间存在长期均衡关系和短期动态关系。长期内人民币实际有效汇率与实际产出呈负相关关系,人民币实际有效汇率每上升1％,实际产出将下降0．26％。短期内,人民币实际有效汇率变化主要对出口产生冲击,并与出口、FDI一起对实际产出产生影响。     

The Most Beautiful Variations on Fair Wages and the Phillips Curve

This paper explores the connection between inflation and unemployment in two different models with fair wages in both the short and the long runs. Under customary assumptions regarding the sign of the parameters of the effort function, more inflation lowers the unemployment rate, albeit to a declining extent. This is because firms respond to inflation—which spurs effort by decreasing the reference wage—by increasing employment, thus maintaining the effort level constant as implied by the Solow condition. A stronger short‐run effect of inflation on unemployment is produced under varying as opposed to fixed capital, given that in the former case the boom produced by a monetary expansion is reinforced by an increase in investment. Therefore, I provide a new theoretical foundation for recent empirical contributions that find negative long‐ and short‐run effects of inflation on unemployment.     

Fiscal policy and external adjustment: New evidence

Relatively little empirical evidence exists about countries' external adjustment to changes in fiscal policy and, in particular, to changes in taxes. This paper addresses this question by measuring the effects of tax and government spending shocks on the current account and the real exchange rate in a sample of four industrialized countries. Our analysis is based on a structural vector autoregression in which the interaction of fiscal variables and macroeconomic aggregates is left unrestricted. Identification is instead achieved by exploiting the conditional heteroscedasticity of the structural disturbances. Three main findings emerge: (i) the data provide little support for the twin-deficit hypothesis, (ii) the estimated effects of unexpected tax cuts are generally inconsistent with the predictions of standard economic models, except for the US, and (iii) the puzzling real depreciation triggered by an expansionary public spending shock is substantially larger in magnitude than predicted by traditional identification approaches.     

Monetary policy under dual exchange rates

This paper finds that the introduction of dual exchange rates gives the monetary authority greater independence from external constraints than it would otherwise enjoy. The monetary authority is able to influence the level of aggregate demand in the short run and to sterilize the effects of temporary foreign disturbances. In addition, the paper finds that dual rates insulate the domestic economy fully from foreign interest rate changes but do not provide insulation from speculative disturbances.